Chemistry and structure of coal-derived asphaltenes and preasphaltenes. Quarterly progress report, July-September 1980

Technical Report · Tue Jan 01 04:00:00 EST 1980

OSTI ID:6184496

Yen, T F

In order to determine the role of oxygen in altering the microstructure of the residues and the differences in reaction paths during heat-treatment, two asphaltenes, Catalytic Incorporated and FMC-COED, were pyrolysed and the residues studied using Fourier Transform Infra-red (FTIR) analysis. These were pyrolyzed under the standard conditions (N/sub 2/ purge, 13/sup 0/C/hr to 360/sup 0/C, 5/sup 0/C/hr to 500/sup 0/C) and samples were taken at appropriate temperature intervals. The residues were fractionated into oil-resin, asphaltene, preasphaltene and mesophase and transformation curves obtained. Elemental analysis of the residue fractions was done for use in conjuction with FTIR analysis to get structural information. The conclusions from this study are: (1) the pyrolysis reactions are predominantly loss of alkyl and hydroxyl groups; (2) the FMC-COED condensation reactions lead to a peri-condensed material; (3) the oxygen stays in the pyrolysis residue as a ketone and ether for FMC-COED and as a ketone for Catalytic Inc; and (4) in the FMC-COED which starts out with a large amount of oxygen and forms a fine isotropic mesophase, the reactions of cross linking through the polar groups to form ethers do occur and for Catalytic Incorporated which forms a coarse mesophase the oxygen residue remains as ketone groups.

• Research Organization: University of Southern California, Los Angeles (USA)
• OSTI ID: 6184496
• Report Number(s): DOE/ET/10626-T1; FE-2031-18; ON: DE81025932
• Country of Publication: United States
• Language: English

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ABSORPTION SPECTROSCOPY
ASHES
ASPHALTENES
ASPHALTS
BITUMENS
CARBON
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
DATA
DECOMPOSITION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
FOURIER TRANSFORMATION
FRACTIONATION
HIGH TEMPERATURE
HYDROGEN
INFORMATION
INFRARED SPECTRA
INTEGRAL TRANSFORMATIONS
LIQUEFACTION
LIQUIDS
NITROGEN
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SULFUR
TAR
THERMOCHEMICAL PROCESSES
TRANSFORMATIONS